Infantile spitting up is mostly caused by the imperfect development of gastrointestinal digestive function. Usually, the symptoms of spitting up can be significantly reduced after 4-5 months of age, and most of the infants can be completely disappeared after 6-8 months of age. Infants often spit up because they do not adapt to the feeding method or are too young, the stomach is horizontal, the bottom of the stomach is straight, the cardia sphincter is relatively loose, and the stomach contents are easy to reflux. Usually after the age of half a year, as long as the feeding is proper and the gastrointestinal function is normal, spitting up will not occur again. If an infant spits up after 8 months of age and continues to spit up with growth and development lagging behind, it is considered to be gastroesophageal reflux disease (GERD) and needs to be diagnosed by the pediatrics department of the hospital. Parents need to be careful to avoid swallowing air during breastfeeding, prohibit breastfeeding when the infant is crying violently, and try to tilt the infant’s body at a certain angle to facilitate the entry of milk into the small intestine. In addition, if the baby goes to sleep after feeding, let him sleep on his side or on his stomach to help relieve the symptoms of spitting up.